The title compound, [Ni(C(2)H(8)N(2))(3)]I(2), crystallizes with an [Ni(en)(3) (2+)] cation (en is ethane-1,2-diamine) and two iodide ions in the asymmetric unit. Two of the en ligands surrrounding the Ni(2+) ion have disordered C atoms, while the third exhibits extensive weak N-H⋯I inter-actions with the two iodide ions that extend throughout the crystalline lattice, producing an infinite network along (011).